linux-kernel - Re: [PATCH v2] pinctrl: tegra: Add support to display pin function

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Message-ID: <0cf720bf-ae4b-5780-bda4-5c9bbb2d1d67@nvidia.com>
Date:   Fri, 14 Jul 2023 11:22:10 +0100
From:   Jon Hunter <jonathanh@...dia.com>
To:     Thierry Reding <thierry.reding@...il.com>,
        Prathamesh Shete <pshete@...dia.com>
Cc:     linus.walleij@...aro.org, linux-gpio@...r.kernel.org,
        linux-tegra@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] pinctrl: tegra: Add support to display pin function


On 14/07/2023 10:47, Thierry Reding wrote:
> On Thu, Jul 13, 2023 at 01:51:06PM +0530, Prathamesh Shete wrote:
>> The current function for a given pin is not displayed via the debugfs.
>> Add support to display the current function that is set for each pin.
>>
>> Signed-off-by: Prathamesh Shete <pshete@...dia.com>
>> ---
>>   drivers/pinctrl/tegra/pinctrl-tegra.c | 19 +++++++++++++++++--
>>   drivers/pinctrl/tegra/pinctrl-tegra.h |  2 ++
>>   2 files changed, 19 insertions(+), 2 deletions(-)
>>
>> diff --git a/drivers/pinctrl/tegra/pinctrl-tegra.c b/drivers/pinctrl/tegra/pinctrl-tegra.c
>> index 4547cf66d03b..4da8873942cf 100644
>> --- a/drivers/pinctrl/tegra/pinctrl-tegra.c
>> +++ b/drivers/pinctrl/tegra/pinctrl-tegra.c
>> @@ -96,6 +96,7 @@ static const struct cfg_param {
>>   	{"nvidia,slew-rate-falling",	TEGRA_PINCONF_PARAM_SLEW_RATE_FALLING},
>>   	{"nvidia,slew-rate-rising",	TEGRA_PINCONF_PARAM_SLEW_RATE_RISING},
>>   	{"nvidia,drive-type",		TEGRA_PINCONF_PARAM_DRIVE_TYPE},
>> +	{"nvidia,function",			TEGRA_PINCONF_PARAM_FUNCTION},
>>   };
>>   
>>   static int tegra_pinctrl_dt_subnode_to_map(struct pinctrl_dev *pctldev,
>> @@ -470,6 +471,12 @@ static int tegra_pinconf_reg(struct tegra_pmx *pmx,
>>   		*bit = g->drvtype_bit;
>>   		*width = 2;
>>   		break;
>> +	case TEGRA_PINCONF_PARAM_FUNCTION:
>> +		*bank = g->mux_bank;
>> +		*reg = g->mux_reg;
>> +		*bit = g->mux_bit;
>> +		*width = 2;
>> +		break;
>>   	default:
>>   		dev_err(pmx->dev, "Invalid config param %04x\n", param);
>>   		return -ENOTSUPP;
>> @@ -620,6 +627,7 @@ static void tegra_pinconf_group_dbg_show(struct pinctrl_dev *pctldev,
>>   	s8 bank, bit, width;
>>   	s32 reg;
>>   	u32 val;
>> +	u8 idx;
> 
> This declaration could be moved into the only conditional that uses this
> variable...
> 
>>   
>>   	g = &pmx->soc->groups[group];
>>   
>> @@ -633,8 +641,15 @@ static void tegra_pinconf_group_dbg_show(struct pinctrl_dev *pctldev,
>>   		val >>= bit;
>>   		val &= (1 << width) - 1;
>>   
>> -		seq_printf(s, "\n\t%s=%u",
>> -			   strip_prefix(cfg_params[i].property), val);
>> +		if (cfg_params[i].param == TEGRA_PINCONF_PARAM_FUNCTION) {
>> +			idx = pmx->soc->groups[group].funcs[val];
> 
> ... so that this would become:
> 
> 			u8 idx = ...;
> 
> Either way:
> 
> Acked-by: Thierry Reding <treding@...dia.com>


Looks good to me ...

Reviewed-by: Jon Hunter <jonathanh@...dia.com>

Thanks!
Jon

-- 
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